Color-measuring device.



P. HELLIGE. COLOR MEASURING DEVICE.

APPL'IOA'TIQII FILED OCT 8, 1910.

Patented July 18, 1911.

onrrsn siriirss reruns oriuon.

FRITZ HELLIGE, OF FREIBURG, BREISGAU, GERMANY.

COLOR-MEASURING DEVICE.

ll'll filtm. Specification of Letters Patent. ntent (l J l 18 1911 Application filed October 8, 1910. Serial No. 586,061.

To all whom it may concern:

3c it known that I, Fnrm Henmon, a subject of the German Emperor, residing The said sliding element carries a scale at l reiburn' i. Bre'isgau, in the Grand, d I

adapted to be adjusted in relation to a fixed pointer c. On the sliding member is provided a vessel y of wedge-shaped cross sec tion adapted to contain the lluid by which the comparison is made, so that the inclosed fluid shows oninspection a variable thickness according to the point, at which itis viewed and consequently color. Behind the wed e-shaped vessel the sliding member with an opening, which is closed by a glass plate, which allows difl'used light to enter the vessel. The front side of the wooden vessel is pro- Duchy of linden, Germany, have invents certain new and useful Improvements in Color-lilcasuring Devices, of which the following is a Specificatidn.

The present invention relates to a color measuring device, which is applicable for in medical. chemical and industrial purposes. and is characterized in that the liquid serving for purposes of comparison in the determination of the color is inclosed in u Vessel of wedge-shaped cross section, vided withawooden sliding member which hie-h can he moved in relation to the liquid is provided ata suitable height with an into he examined, which latter is contained spectionapertureli behind \vhichaHelmholtz in a suitable receptacle held in a relatively double glass plate Z is provided. The said fixed position, and so renders it possible to Helmholtz double glass plate consists of two Hlliillll a view through a fluid layer of variplane glass plates 2" and 2' each of which is uhlc thu-l-rncss. By this means gradations beveled at 2' at an angle of so that the o1 iiulul are mtublished by the sliding moveuu-ut. by which. on comparison with the color of the liquid to be examined, the peri-miiug'c contents of the letter in color-sub sinner-s. can be accurately determined by hoioiucn-ical methods, and the dividing lino between the two halves of the tield of islmi run he caused to disappear by the use of a Helmholtz double glass plate, this being hc critical point in the accuracy of the photoiuclricul determination.

The invention is distinct fromthe hitherio customary color-measuring devices, which are either very ex ensive and lack simlicity of construction, or else can only be applied for very limited determinations of hood-colored nmteriuls, in thatit is always ready for use, can be applied for all pures in measuring gradations of color, gives a rapid determination with great ac uracy. and the various parts forming the Uuliril'llt'tlOll can lie-easily replaced.

A constitutional form of the invention is shown in the drawing,

Figure l an elevation with the closing partly removed. Fig. 2 is a lonplates 2" and 2' will be arranged atright angles to each other as shown in Fig. 3. The two glass plates are of equal thickness and are cemented together at the edges 2'". In the construction illustrated, the Helm holtz double glass plate is so disposed that its edge a" coincides with the inner edge of thewedge-shaped vessel 9..

On the broad side of the frame opposite the vessel g there is provided a trough n on a stationary tray m. Thisis the color 001]- taincr for the reception of the liquid to be examined, which should be made so that it will resist acid, transparent, glass being suitable for its construction! When the Helmholtz double glassplate is adjusted in the position shown in Fig. 3 the light passing through the vessel 7 and receptacle n and through the said glass plate will produce, on the eve of an observer at opening 10, continuous color hand. that is to say the two fields'of vision. Will register and there will he no dividing line apparent between the two fields of vision through recepta cles r and u.

lid shown gitudinal section on the line rk li of Fig In the useof the color-measuring device 1. and Fig. 3 1s a cross section on the line-l the sliding member (Z and the vessel conll) of Fig. The color sentially of a 2. measuring device consists eswooden vessel 0, which may be approximately square in cross-section* the rear side of which consists of a sliding element e operated by means. of a rack Z: fixed to the sliding element and pinion 6.

Mining the liqui d for COII'IPaI'lSOII, are moved past the trough n containing the liquid until both liquids appear gradations of the ing provided with a sight opening thin said receptacle W1 contain a liquid to be examined, a wedgeshaped receptacle adapted to contain a standard solution said wedge-shaped vessel being movable with named receptacle disposed at said sight; opening}; in end to end relation to each. other: said plates being angular-1y arranged with respect to each other and each plate being singularly in (lined with respect to the fr 1 of said casing, one being in the path of rays of light passing through one of said receptacles and through said sight-opening.

being; in the path or". rays passing through the other of said receptacles 1 1 said sight opening Wnereoy a respect; to said firstt'he eye of the observer.

A color measuring device, consisting a suitable casing, the front; being provided with a sight opening a fixed receptacle within said adapted contain a liquid to be shaped receptacle also Within said car adapted to contain a standard solution said vessel being movable with Wedge-shaped spect to plates or" glass disposed. at said sl ht open being positioned ing, said plates of glass substantially so disposed that through one of said glass plates and throu opening, and additional rays oi light may nass through the other of and the other of said glass plates and also through said sight openin 3. A color measuring de ice, consisting of a suitable casing, the front of said casing being provided with a sight opening a fixed receptacle Within said CHSUIQ adapted to 1 contain a liquid to be examined a Wedgeshaped receptacle adapted to contain av standard solution said Wedgeshaped vesse and two plates of glass 3 and the other j and through sensation of a a continuous color band Will be produced on of sa d casio c said fiTSlT'l'lilHlQd receptacle, and two 90 to each other and being rays of light; may pa s said receptacles and one oil 1 h said sight said receptacles being'movable with respect it) rec pi tacle, and two plates of lr" gs disposed at t said sight opening, each oi: raid lass plates and the two glass being beveled lug cemented together a ill cit the said cemented edges lJPItt tes benictliately adjacent the edge of Bar. l snap-ed vessel which is i'ieare receptacle.

t 4;, A. color measuring:

a suitable casing. the r mounted on said rear l mg being movable up l i l in said cas fixed lt-(f l fiiflC-ltl with l to contain a liquid to be examined, a Wedge l shaped receptacle carried by the said rear side oi the casing and movable there h 1 adapted to contain standard solution. said rear side of the casing b provided. with roe-ans for the admission of li g ht tears and the front of said casing; being: prowl l *ith a sight opening, and two plates glass disposed at said it positioned "i.

. and being so dismay i a tilirm and one oi e glass plates and through said sight opcuir' l and additional rays oi light: may p: l through the other of said reccpta l other of said glass plates and. a

posed 1 r cics ane lso said sight opening. 1'') l color moasuru'ig device cons:

able casing the rear side of said casing' being movable up and down, a scale mounted on said rear side of casing fixed receptacle within said. casing'atlaped to contain. :1 liquid to be examined, a wed shaped receptacle carried by the rear side oi? the said casing and movable therewith adapted to contain a standard solutiom l rear side oi the casing uring provi' v means tor the admission oi light the front. oi'said casing: t ine n'ovided with 1 a sun said l a opening and two plates or glass (it eposed at said sight, opening; each of said '"l'tss plates being beveled at one 4 i thereof a d the two gla plates being cemented tooetherat the said liicwled edges the said 0 uiented edges being dispo d ionnchotel ao accnt the edge or said vaccine-shaped re sol which is nearest said fixed receptacle.

Dated this 23rd day of September tllltl. in testimony whereof l allix my signature of two witnesses,

FR???) l lil lllljltzvl l. 

